Screenwriter Toyoto Kogisu, who wrote multiple television episodes for the long-running anime adaptation Detective Conan as well as several popular police dramas, died on September 29, 2026, at age 69. The Writers Guild of Japan announced his death on October 19 through an update on its website, but the group didn’t disclose a cause of death [1]. His passing closes a television career that spanned more than four decades in Japanese animation and live-action broadcast networks [3].
Writers Guild Announcement
The Writers Guild of Japan posted the death notice for Toyoto Kogisu on Monday, October 19, 2026, confirming that the screenwriter had passed away on September 29, 2026. He was 69 years old [1]. The brief notice offered condolences to his family while withholding details about an illness, following personal privacy practices common among Japanese creative guilds [4].
Japanese animation and television writers have mourned several losses in recent years, including animator Kenichiro Katsura at age 59. Writers and industry peers praised Kogisu’s long reliability in television production, pointing to his steady scripts that helped sustain weekly broadcasts across decades while delivering disciplined mysteries marked by clear clues and orderly narrative conclusions. Freelance writers sustained these tight weekly production schedules [6].
News outlets including OtakuKart and Anime News Network reported his passing after checking the guild registry [5]. The three-week interval between his death on September 29 and the guild post followed family mourning traditions before public notices [4]. He belonged to the guild for decades [1].
Toyoto Kogisu and Detective Conan
Between 2000 and 2018, Toyoto Kogisu wrote anime scripts for Detective Conan, an enduring mystery series animated by TMS Entertainment. The television anime premiered in 1996 [3]. While multiple storylines adapt chapters directly from the manga, production teams rely on experienced television dramatists to script original anime-only mysteries that fill broadcast schedules, requiring writers to balance action with methodical detective deduction. Kogisu wrote these standalone episodes by bringing the structural rigor of live-action police procedurals to animated stories that had to fit within a standard twenty-two-minute television slot [4].
Writing original cases for the show presented creative hurdles, as each script had to preserve the established personalities of Conan Edogawa and Ran Mori while inventing fresh crime methods. Kogisu set his plots in isolated locations where suspects had distinct motives and conflicting stories [2]. He relied on physical evidence. His mysteries favored clever timing tricks and realistic mechanical deceptions rather than fantasy gadgets, allowing attentive viewers to deduce the culprit with the young detective [6].
His work on the show stretched over eighteen years, spanning the switch from hand-painted cel animation to digital video production [3]. TMS Entertainment relied on his scripts to deliver dependable ratings during non-manga broadcast runs. His eighteen-year run remains one of the longest guest-writing contributions in the series [4].
Mystery Mechanics in Episode 733
A clear example of Toyoto Kogisu’s television writing is Episode 733 of Detective Conan, titled The Wedding Reception and the Two Gunshots, broadcast on March 22, 2014. In this episode, Sonoko Suzuki invites Conan and Ran to a wedding held in a forest chapel for Masaru Hatakeyama and Miho Ito. Sonoko explains that Masaru fell in love with Miho while she worked as manager of his family villa. The gathering brings together family members with financial grievances, including Masaru’s mother Yuko, his sister Rikako Ishihara, her husband Tatsuya, an uncle named Kenshiro, and a cousin named Arisa who hoped to marry Masaru herself [2].
The case turns into a double murder when Masaru answers a phone call from Miho, steps out to the parking area, and is found dead from a gunshot wound to his chest. Conan soon hears a second gunshot across the river. Rushing to Miho’s cottage on his solar skateboard, the young sleuth discovers the bride dead from an identical bullet wound, prompting Inspector Megure and local police officers to launch an immediate homicide investigation. Investigators found the revolver the following morning in a hotel flowerbed. Conan spots a fresh bamboo branch near the hidden weapon, while police records reveal that Miho’s brother Yoshifumi Ito carries an unpaid debt of 1 million yen [2].
Security camera footage reviewed with Detective Chiba shows nobody approaching the flowerbed around the time of the shooting. Conan then inspects a nearby bamboo grove. Watching wild monkeys leap between high stalks, he learns from local officers that the animals routinely descend from the mountains, providing the critical deduction needed to explain how the revolver reached the flowerbed [2].
Early Career of Toyoto Kogiso
Long before entering anime, Toyoto Kogiso built his career in Japanese television dramas. He was born in Gifu Prefecture. He enrolled at the University of Tokyo within the Faculty of Letters, where he studied literature before leaving his university coursework to pursue professional scriptwriting across Japanese broadcast networks as a student. In 1980, Kogiso earned his screen debut on the police drama Taiyō ni Hoero! (known in English as Howl at the Sun!), a show that shaped television cop series in Japan [3].
Writing for the popular police drama placed Kogiso in rooms with experienced dramatists who required sound logic and fast story pacing. He delivered completed scripts under tight production deadlines [6]. The demanding apprenticeship taught him how to balance suspect motives with procedural authenticity, preparing him for decades of consistent assignments within primetime mystery blocks that captivated Japanese television audiences [4].
Through the 1980s and 1990s, Kogiso wrote scripts for suspense specials and period dramas known as jidaigeki. Japanese networks produced dozens of two-hour mystery movies each season, offering steady assignments for capable scenario writers who could craft believable alibis, sustain dramatic tension, and conceal key clues until the climactic resolution [3]. He honed his narrative pacing on these productions [6].
Decades in Police Procedurals
Kogiso wrote for several prominent police procedurals [3]. He contributed scripts to Hagure Keiji: Junjōha (Stray Detective: The Pure-Hearted), a long-running police drama centered on compassionate urban investigations [6]. He also wrote for Sasurai Keiji Ryojō-hen (Wandering Detective: Travelogue), a television series that combined travel themes with railway police investigations into complex criminal activity. Both shows enjoyed high television ratings [4].
Another key credit in his career was Bengoshi Takabayashi Ayuko, translated as Lawyer Ayuko Takabayashi, a long-running mystery series featuring legal battles and travel investigations. The series followed an attorney who traveled to towns around Japan to investigate complex criminal cases, requiring teleplays built around intricate travel itineraries, forensic evidence, and timetable alibis that demanded precise factual consistency. Kogiso penned numerous installments for the franchise. The intricate demands of timetable mysteries provided ideal training for his later detective mysteries in anime, blending rigorous clue placement with emotional drama between suspects and investigating officers [6].
Kogiso represented a generation of television writers who moved between live-action drama and animated mysteries, bringing realistic crime structure to weekly anime broadcasts [6]. From his student debut on Taiyō ni Hoero! in 1980 to his final Detective Conan episode in 2018, his career spanned thirty-eight years of continuous contributions to Japanese television storytelling. He retired from scriptwriting in 2018 [4]. The Writers Guild of Japan concluded its announcement by honoring his long membership and dedication to Japanese storytelling [1].
- WEBSITE Writers Guild of Japan. (2026, October 19). Kogiso Toyoto-shi ga goseikyo saremashita [Toyoto Kogiso has passed away]. [Article Link]
- WEBSITE Yomiuri Telecasting Corporation. (2014, March 22). Hirōen to futatsu no jūsei [The wedding reception and the two gunshots]. Case File. [Article Link]
- ONLINE NEWS Anime.com. (2026, October 23). Detective Conan scriptwriter Toyoto Kogiso dies at 69. [Article Link]
- ONLINE NEWS Jones, B. (2026, October 24). Detective Conan scriptwriter Toyoto Kogisu dies at 69, wrote episodes for the anime between 2000 and 2018. OtakuKart. [Article Link]
- ONLINE NEWS Anime News Network. (2026, October 23). Scriptwriter Toyoto Kogisu dies at 69. [Article Link]
- WEBSITE Mintory. (2026, October 23). Remembering Toyoto Kogisu: A legacy in Japanese storytelling. MintOtaku. [Article Link]
